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24 Cards in this Set
- Front
- Back
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superior vena cava
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deoxygenated blood from upper body into right atrium
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inferior vena cava
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deoxygenated blood from lower trunk into right atrium
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coronary sinus
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cardiac veins drain blood from the myocardium and deposit in here; collected venous blood then goes to the right atgrium @ opening of coronary sinus
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pulmonary veins
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carry oxygenated blood from lungs--> heart. open into left atrium
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aorta
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to systemic arteries, from left
curves over pulmonary trunk carries oxygenated blood from left ventricle for systemic distribution |
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pulmonary artery/trunk
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continuation of the outflow tract of the right ventricle
from right ventricle to lungs for oxygenation divides: right and left pulmonary arteries, deoxygenated blood to lungs |
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base
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wider, anterior end, where great vessels exit
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apex
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blunt tip, entirely the left ventricle
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brachiocephalic artery
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branch of aorta, ascends on the right side to divide into two vessels (subclavian and carotid arteries)
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interventricular sulcus
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longitudinal groove dividing ventricles. contains both coronary arteries and veins that supply the heart.
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pulmonary semilunar valve
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base of pulmonary trunk. 3 interlocking cusp-shaped units made of endocardium. prevent backflow into right ventricle when not contracting
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fossa ovalis
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oval depression, right side of interatrial septum, from youth
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chordae tendinae
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tough, thin, connective tissue tstrands extending from the edge of the tricuspid valve to the node-like papillary muscles projecting up from the ventricular walls. contraction of pmuscles->tension from CT on valve flaps->prevention of valve eversion into atrium during ventricular systole
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trabeculae carnae
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lattice-like arrangement of muscle tissue on ventricle inner walls
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right AV valve (tricuspid valve)
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between atrium and ventricle (R)
3 endocardial leaflets prevents blood from flowing back into right atrium during ventricular systole |
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left AV valve (bicuspid valve)
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2 flaps
similar setup to tricuspid valve |
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pericardium
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fibrous: connective tissue, protects and anchors the heart, prevents overstretching
serous: thin delicate membrane, contains: parietal layer: outer, most in contact with fibrous pericardial cavity with PC fluid visceral layer (epicardium): closest to actual heart |
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myocardium
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cardiac muscle layer (bulk)
muscle fibers swirl diagonally around heart in interlacing bundles |
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endocardium
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chamber lining and walls
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sulci
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groove on heart's surface containing coronary blood vessels and fat
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coronary arteries
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found in sulci
circulation is blood supply to heart as a very active muscle, needs a lot of O2 branch off aortic semilunar valve left coronary artery: circumflex branch, anterior interventricular artery right coronary artery: marginal branch, posterior interventricular artery |
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coronary veins
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collect wastes from caardiac muscle, drain into large sinus on posterior surface (coronary sinus)
CS empties into right atrium |
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atrioventricular valves
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open to allow blood to flow from atria into ventricules when Vpressure < atrial pressure
close preventing backflow of blood into atria when ventricles contract |
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semilunar valves
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close when in ventricular relaxation, preventing blood from returning to the ventricles
open with ventricular contraction, allowing blood to flow from ventricles into pulmonary trunk and aorta |
